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## Example files for the title:  

# Intermediate Perl, by Tom Phoenix

[![Intermediate Perl, by Tom Phoenix](http://akamaicovers.oreilly.com/images/9780596102067/cat.gif)](https://www.safaribooksonline.com/library/view/title/0596102062//)

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Please note that the examples are not production code and have not been carefully testing. They are provided "as-is" and come with no warranty of any kind.

This code is from the previous edition, which was titled "Learning Perl Objects, References, and Modules".  It does contain the files mentioned in "Intermediate Perl".   We are hoping the authors will update it at some point, but until then we wanted to make it available here.

These are the sample files for use with the Alpaca book (Learning Perl

Objects, References & Modules by Randal L. Schwartz with Tom Phoenix,

available from O'Reilly and Associates.) These files may be distributed

under the same licensing terms as Perl itself.

Enjoy!

    -- Randal and Tom

alpaca sample files version 1.0  28 July 2003.

# In the hopes of saving some typing time, this is the sub from page 22

# (or so) in chapter 3 of the Alpaca book, ready for you to use in the

# second exercise at the end of the chapter.

sub check_required_items {

    my $who = shift;

    my $items = shift;

    my @required = qw(preserver sunscreen water_bottle jacket);

    my @missing = ();

    for my $item (@required) {

	unless (grep $item eq $_, @$items) {	# not found in list?

	    print "$who is missing $item.\n";

	    push @missing, $item;

	}

    }

    if (@missing) {

	print "Adding @missing to @$items for $who.\n";

	push @$items, @missing;

    }

}